Battery adapter



FIG. 1 is a top, back right-side perspective view of a battery adapter showing my new design, shown in a joined configuration of use;

FIG. 2 is a top, back, right perspective view thereof, shown in a separated configuration of use;

FIG. 3 is a top, front center perspective view thereof;

FIG. 4 is a rear elevation view thereof, shown in a joined configuration of use;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a top plan thereof; and,

FIG. 9 is a bottom plan view thereof.

The broken lines in the drawings are included for the purpose of illustrating portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a battery adapter, as shown and described. 